confile: handle appending init groups

src/lxc/conf.c

@@ -2671,6 +2671,7 @@ struct lxc_conf *lxc_conf_init(void)
 	 * default to running as UID/GID 0 when using lxc-execute */
 	new->init_uid = 0;
 	new->init_gid = 0;
+	memset(&new->init_groups, 0, sizeof(lxc_groups_t));
 	memset(&new->cgroup_meta, 0, sizeof(struct lxc_cgroup));
 	memset(&new->ns_share, 0, sizeof(char *) * LXC_NS_MAX);
 	seccomp_conf_init(new);

src/lxc/confile.c

@@ -4618,14 +4618,6 @@ static inline int clr_config_init_gid(const char *key, struct lxc_conf *c,
 	return 0;
 }
 
-static inline int clr_config_init_groups(const char *key, struct lxc_conf *c,
-					 void *data)
-{
-	free_disarm(c->init_groups.list);
-	c->init_groups.size = 0;
-	return 0;
-}
-
 static inline int clr_config_ephemeral(const char *key, struct lxc_conf *c,
 				       void *data)
 {